<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>受控组件</title>
</head>
<body>
    <div id="test"></div>
	
	<!-- 引入react核心库 -->
	<script type="text/javascript" src="../js/react.development.js"></script>
	<!-- 引入react-dom，用于支持react操作DOM -->
	<script type="text/javascript" src="../js/react-dom.development.js"></script>
	<!-- 引入babel，用于将jsx转为js -->
	<script type="text/javascript" src="../js/babel.min.js"></script>
	<!-- 引入prop-types，用于对组件标签属性进行限制 -->
	<script type="text/javascript" src="../js/prop-types.js"></script>

	<script type="text/babel">
        class Login extends React.Component{
            state = { username:'',password:'', };
            handleSubmit = (event)=>{
                event.preventDefault(); //阻止表单提交
                // const {username,password} = this;
                // console.log(`输入的用户名是${username.value},输入的密码是${password.value}`);
            }
            //记住，onChange里面必须写成一个函数
            saveFormData(dataType){
                return (event)=>{
                    this.setState({
                        [dataType]:event.target.value,
                    })
                }
            }
            render(){
                return (
                    <form action="#" onSubmit={this.handleSubmit}>
                        用户名：<input onChange={this.saveFormData('username')} type="text" name="username"/>
                        密码：<input ref={this.saveFormData('password')} type="password" name="password"/>
                        <button>登录</button>
                    </form>
                )
            }
        }
        ReactDOM.render(<Login />,document.getElementById('test'));
    </script>
</body>
</html>